Valve for fluid-motive apparatus



Dec, 16, 1924. 1,519,205

' K. KIEFER VALVE FOR FLUID MOTIVE APPARATUS Filed June L3 @1921 FIG.1

4; 7 v f/ 28 M Em I III % INVENTOR Patented Dec. 16, 1924.

KARL KIEFER, 0F CINCINNATI, OHIO.

VALVE FOB ELUID-MOTIVE APPARATUS.

Application filed June 13, 1921. Serial, No. 477,257.

To all whom it concern:

Be it known that I, KARL Kinrnn, a citizen of the of the United States,resid ng at Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Valves forFluid-Motive Apparatus, of which the following is a specification.

My invention relates to fluid motors or pumps, and more especially tothose of the double-acting reciprocating kind.

The object of my invention is to simplify the construction and operationof devices of this character, to. avoid leakage outside the device, andto increase the durability of the apparatus and reduce the amount oflabor and attention required to keep. it in proper running condition.Other objects will appear in the course of the ensuing description.

I attain these objects by the device illustrated, for example, in theaccompanying drawing, in which-- Figure 1 is a side elevation of a pumpembodymg my invention, one side of the valvechamber being removed toreveal its interior details;

Fig. 2 is a sectional plan View thereof, the section being on a planecorresponding to the line 2-2 of Fig. l, but the pump having operatedthrough an angle of ninety degrees from the positions of Fig. 1;

Fig. 3 is a vertical cross-section thereof on a plane corresponding tothe line 83 of Fig. 2, with the parts in the positions of Fig. 1; and

Fig. 4 is a detail perspective view of the rotary valve and its shaft.

The pump chosen for illustration of my invention is one especiallydesigned as a partof a filling-machine, for forcing substance out intocontainers, as disclosed and claimed in my co-pending application,Serial No. 278,287, filed February 20, 1919. This pump comprises ahanger l by whiclritis attached to the filling-machine as disclosed insaid application, a guideyoke 2 depending from thehanger l, with a longguide in its bottom in which slides a rod 3 of rectangularcross-section. Cylinders 4 depend from the opposite ends of the yoke 2with open ends outward, and pistons or plungers 5 in the respectivecylinders 4 have rods 6 extending out of the open cylinder ends andclamped to adjacent end parts of the rod 3 by clamp-brackets 7, foradjustment along the rod 3. A crank-shaft 8 is journaled transversely inthe yoke 2 midway of its length. A crank 9 is fixed on the shaft 8, witha connecting rod 10 connecting the crank wrist with a bracket. 11 fixedon one end part of the rod 3. This crank wrist is adjusted radially by ascrew 12 and nut 13 (Fig. l) to vary the stroke; the plungers 5 beingcorrespondingly adjusted along the rod 3, to clear the cylinder ends asmuch as desired. This varies the amount delivered at a stroke, and alsomay vary the clearance in accordance with various substances delivered.These are details of my pump as shown in said co-pending application;but the valve herein is an improvement over the valve therein.

The valve-chamber 14, between the inner cylinderends, communicates withthe respective cylinders 4 through ports 15, located in the bottoms ofthe otherwise closed inner cylinder-ends, so that solid or more denseparticles gravitate to these ports and escape being caught between theplungers and the cylinder-ends. This arrangement of ports also is shownin my co-pending application before referred to.

This valve-chamber 14 comprises the main cylindrical part with its axisat right-angles to the alined cylinder axes and a considerable distancebelow them; as here shown,

the horizontal diameter being below the bottoms of the cylinders 4 andthe ports 15 curving down and entering the chamber 14 on the horizontaldiameter. These ports 15 have their greatest dimension horizontal (Figs.2 and 3). Brackets 16. extend up from opposite sides of the cylindricalpart, and contain these ports v15., these brackets joining the adjacentclosed ends of the cylinders 4, and also projecting toward each other atthe tops of the cylinders, serving to additionally attach the cylinders4 and Valve chamber 14 to the bottom of the guide-yoke 2. The cylinders4 and valve-chamber 14 may be cast in one piece,

The rotary valve 17 comprises a hub 18 with a semi-circular flange 19 ateach end, concentric therewith; the flanges at the opposite ends beingdiametrically opposite across the hub axis. WVebs 20 extend fromopposite sides of the hub 18 coincident with and joining the straightedges of the flanges 19, and terminate at the peripheries of theflanges. The thickness of these webs 20 is Slightly greater than thevertical width of opposite sides of the pump. The head 23 at the near orfront side has the bearing 25 for the shaft 22, and below that has theinlet port 26, in a neck 27 projecting forward past the bearing 25 forconnection of a pipe or hose thereto. The head 24 at the rear side hasthe bearing 28 for the shaft 22, and below that has the outlet port 29,in a neck, 30. A spur-gear 31 is fixed on the shaft 22 at the rear ofthe rear bearing 28, meshing with a spur-gear 32 of equal size, fixed onthe crank-shaft 8. The neck 30 and its contained port 29 curve down toextend back under the gear 31; and the gears 31 and 32 are located farenough back to permit this. The heads 23 and 24 are secured in place bynuts 33 on studs 34 fixed in. ears 35 at top and bottom of oppositesides of the cylindrical part of the chamber 17; and the bearings 25 and28 extend in to the adjacent ends of the rotaryvalve hub 18, holding therotary valve 18 midway of the length of the chamber, in which. positionits opposite end flanges 19 will sweep past opposite ends of theentrances of the ports 15, alternately cut ting off each port 15 fromcommunication with the inlet port 26 and allowing it to communicate withthe outlet port 29, while the other port 15 is cut off from the outletport 29 and allowed to communicate with the inlet port 26. Theperipheral edges of the flanges 19 and webs 20 being turned to sweepvery close to but not touching the wall of the valve-chamber cylindricalpart, these alternate connections and cut-offs are accomplished withlittle friction and wear. At the same time, I have found that there ispractically no leakage from one side of the rotary valve 17 to theother, mounted in this way; and leakage from the valve-chamber to theoutside of the apparatus is entirely avoided.

This rotary valve 17- being connected by means of the gears 31 and 32with the crankshaft 8 so that its webs 20 pass the respective ports 15just as the pistons or plungers 5 reach opposite ends of their strokes,as seen in Figs. 1 and 3, it will connect the port 15 of one cylinder 4,as at the right, to the inlet port 26 just as the plunger 5 thereinstarts to the right in Fig. 1, and. the port 15 of the other cylinder 4,at the left, to the outlet port 29 just as this plunger in this cylinderstarts to the right. The one at the right thus is drawing in the fluid,by'moving away from the closed end of the cylinder, while the plunger atthe left is expelling fluid by approaching the closed end of itscylinder. In the next half revolution, the valve will reverse theseconditions in the two cylinders. Fig. 2 shows the parts at the middle ofone of these half-revolutions, when the respective ports are connectedto the fullest extent; showing clearly how this is accomplished.

The rotary valve 17 preferably is made so that it will slide off itskeyed connection with the shaft 22 readily; and by unscrewing the nuts33 from the studs 34, the head 23 at the front side is removed readily,upon which the rotary valve 17 is pulled out of the chamber 14 easily,by grasping the hook 21. If only one hook 21, at one end of the hub 18,is provided, as shown, it is required that care be taken to insert thevalve again with this hooked end to the front, where it may be reached.The valve will operate whichever end is inserted to the rear; and thehub 18 may have a hook 21 at each end, if desired, to avoid thenecessity for care in replacing the valve in the chamber. Such removal,however, is not frequent, as the mechanism is so simple that derangementor clogging, requiring this access to the valve or the interior of thechamber, is not very liable to occur.

It will be understood that otherapplications of my invention arepossible, and numerous modifications may be made. I do not wish to beunderstood as being limited to the precise showing and description ,v

herein, but what I claim as new and desire to secure by Letters'Patentis:

1. A rotary valve element coi'nprisinig a lnib,'semicircular flanges,one at each end of said hub, concentric, therewith and diametricallyopposite each other across the hub axis, and webs extending fromopposite sides of said hub coincident with and joining the straightedges of said flanges and substantially conterminous with theperipheries of said flanges.

2. A valve chamber with a cylindrical interior and having passagesopening at opposite ends of said interior and passages opening atsubstantially diametrically opposite sides of said interior, and a valveelement rotatable in and concentric with said interior, comprisingflanges near the respective ends and webs joining the flanges from endto end and sweeping past said side passages as the element rotates,whereby each side passage is alternately connected with one end passageto the exclusion of the other side passage.

3. A valve chamber with a cylindrical interior, a valve element thereincomprising segmental circumferentially spaced flanges near opposite endsof the chamber and Web means joining said flanges across an axial planeof said chamber, a shaft for said element, j ournaled in opposite endsof said chamber, means detachably connecting said element to rotate withbut slide endWise off of said shaft, one end of said chamber beingremovable for sliding said element endWise from said chamber, ofl ofsaid shaft, and engaging means on said element near said removable endand apart from the flange near said end, to be engaged for Withdrawingsaid element from said chamber When said end is removed.

KARL KIEFER.

